Access point is a wireless base station designed to provide wireless access to an existing network (wireless or wired) or creating a completely new wireless network. Wireless communication is carried out by Wi-Fi technology.
Conducting an analogy, the access point can be convened to compare with a cellular operator, with the reservation that the access point has a smaller range and the connection between the devices connected to it is carried out using Wi-Fi technology. The radius of the standard access point is approximately 200-250 meters, provided that at this distance there will be no obstacles (for example, metal structures, overlaps from concrete and other structures of poorly transmitting radio wave).
Scope of application
In most cases, wireless networks (using access points and routers) are built for commercial purposes to attract profits from customers and tenants. The staff of the company "GET WiFay" have experience in the preparation and implementation of the following projects on the implementation of network infrastructure based on wireless solutions:
It is important to note that to implement a good job in the modes "Repeater" and "Bridge", SSID (wireless network identifier), channel and encryption type must match.
Wireless networks from several access points are installed in large office space, buildings and other major objects, mainly in order to create one wireless local area network (WLAN). Each access point can be connected to 254 client computers. In most cases, it is inappropriate to connect more than 10 computers to one access point, because The data transfer rate for each user is distributed in equal proportions and the greater the option of the "customers", the smaller the speed of each of them. For example, according to our measurements, the actual data transfer rate at the access point operating on the 802.11g standard - 20-25 MBIT / s, and when connected to it 10 clients, the speed for each will be around 2,5 Mbps.
When building geographically distributed networks or wireless networks in buildings, access points are combined into one common network through a radio channel or a local network (wired). In this case, the user can move freely with its mobile device within the radius of the action of this network.
In the home network, the wireless access points can be used to merge all home computers to one common wireless network or to "expand" an existing network built for example, on a wired router. After connecting the access point to the router, the clients will be able to join the home network without the need to re-configure the local connection.
Access point is similar to its device with a wireless router (wireless router). Wireless routers are used to create a separate network segment and support all computers with built-in wireless network adapters. In contrast to the access point in the wireless router, a network switch (switch) is integrated, in order to further connect clients using the Ethernet protocol or to connect other routers when creating a network from several wireless routers. In addition, wireless routers have built-in firewall, which prevents the unwanted invasion of the network of attackers. Otherwise, wireless routers are similar to the device with access points.
Like wireless routers, most access points support 802.11a, 802.11b standards, 802.11g or combinations thereof.
How does a WiFi router work?
WiFi Router works on the principle of mobile operators. But, unlike the steps that radiate a large stream of radio emission, the router does not bring any harm to our health, so it can be safely installed in apartments.
The usual WiFi router spreads a signal to a radius of up to 100 meters, but it is considered for open premises. If you are a happy owner of more than 2 device devices on Wi-Fi, then the presence of a WiFi router will be very convenient for you. With it, you can establish your home wireless home network.
But it should be borne in mind that any device connected to the router will reduce the speed of your Internet. Of course, the total speed of your Internet will not be outlined, but the Internet will work somewhat slower.
To understand the principle of operation of the WiFi router, there is nothing complicated: you have a wire in an Internet provider to you, which connects to the WiFi router to which all sorts of WiFi can be connected via WiFi networks: laptops, stationary computers, digital TVs, and even cameras. Routher task to divide received from the provider between all devices. Therefore, it is advisable to protect the connection to your WiFi network password.
Consider three basic access point mode:
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2.) MOST MODE |
Honestly, today I am something too lazy to write some regular instruction, so I decided to talk about access points. What is the access point, for which they need, what they differ from routers, and how to make an access point from the router. Some specific, step-by-step instructions in this article you will not find. Later, in a separate article I will write about how to use a Wi-Fi router in AP (Access Point) mode.
Wireless access point: what is it, and what is needed?
First of all, the access point is a separate device. Router and access point, this is not the same thing. Yes, in many respects they are similar. It can be said that the access point is a trimmed, a simpler version of the router. The fact is that the wireless access point is designed to connect devices to the already created network. Its task is to simply organize an Internet connection on Wi-Fi. Also, it can work in different modes: wireless client, bridge, repeater, access point. It all depends on the specific model.
The access point does not distribute the IP, it does not connect to the provider, does not have a built-in firewall, etc. It just gets the Internet from the router, or a modem, and distributes it to Wi-Fi. Some wireless access points that are on sale can hand out IP, organize a separate network, and even connect to the Internet provider. But, only on the Static IP, or DHCP protocol. Most likely, without a router, or modem, everything is exactly not to do. And one more important point, the access point has only one network connector. So, on the cable she does not distribute the Internet.
For example, if you need to distribute the Internet by Wi-Fi from an ADSL modem, or expand the already existing Wi-Fi network, then in this case the access point is perfect. For this, they are created. As I wrote above, many models can work in customer mode, or. Many modern routers also know how to work in all these modes.
In the access point mode, we connect it to the router, or a network cable modem, and get access to the Internet by Wi-Fi network. If you want to connect a wireless access point "by air", you can configure the bridge mode (WDS), or in the repeater mode. You need to look at what is best suited specifically in your case.
Router and access point
The router itself, also acts as an access point, it allows you to connect to a Wi-Fi network. In addition, almost each router can work in AP mode. For some manufacturers, for example, ASUS, ZYXEL, it is just enabled in the router settings. Later, I will definitely write a detailed instruction on setting up this mode of operation on routers of different manufacturers.
In the access point mode, the distribution of IP addresses (DHCP), firewall, and the transformation of IP addresses (NAT) be turned off on the router. Just turns off several possibilities of the router, and it turns into Access Point.
On some routers, there is no such AP mode. There you just need to manually disable the DHCP server, and execute a few more settings.
findings
If you do not know which device you need, router, or access point, then it is better to ask for knowledgeable people, or buy a regular router. Buy an access point only when you know exactly what she suits you.
Almost any router can work in Access Point mode. And the access point itself cannot perform the role of the router. It is devoid of many opportunities that are in the usual router.
By the way, a regular laptop, or a computer with a Wi-Fi adapter can also be turned into a wireless access point. I already wrote. And if you have Windows 7, then look.
That's all right. If you have any questions left, you can leave them in the comments. Good luck!
- Wireless network with support for IEEE 802.11b / g / n standards
- Operation in harsh climatic conditions, IP65 protection class
- Operating Modes: AP, Client Bridge, WDS
- AIRMAX technology support to prevent collisions
- Reliable protection of network information with WEP, WPA and WPA-2 encryption
- Output power up to 600 MW
- Antenna coverage sector in horizontal plane 55 °
- Built-in antenna with double polarization and amplification 10.4 ~ 11.2 DBI
- Intelligent Purpose Priority For Streaming Traffic
- Ethernet cable
Access point Nanostation M2K. It is a Wi-Fi 2.4 GHz transmitter with a capacity of 600 MW with an integrated sector MIMO 2 × 2 antenna with an amplification coefficient 11DBI: Very impressive, especially considering more than modest sizes and weight in 400 g. This access point is made in a moisture-proof, frost-resistant building and Designed for operation in a wide range of temperatures from -30 to + 70 ° C. Nanostation M2K. Standard 802.11b / G / n is designed to maintain the maximum coating at the highest data rate. It optimally combines low weight, high quality work, POE power. Nanostation M2K. - This is a simple and convenient device that allows you to organize a wireless network anywhere with minimal investment.
Features Nanostation M2K.
Nanostation M2K. Supports technology AirmaxThe use of which allows you to prevent collisions for wireless data transmission. The intelligent planner will provide an opportunity to assign high priority for video and voice traffic, as well as assign priorities to individual customers.
"Access point" mode
Since the integrated antenna has a horizontal sector in 55 °, it will be very appropriate to apply Nanostation M2K. As an access point. It will give the opportunity to connect wireless customers to 6 km away. The flexibility in the setting and impressive power of the device will help build a whole network as the Station using the same Nanostation M2K.. Such an infrastructure will be applicable to the organization of wireless access in settlements or will be associated with the central office remote branches.
Mode "Wireless Client"
If the task is to connect to the access point remote to a distance of several kilometers, it is possible to implement it with Nanostation M2K.. Compact device, the ability to work smoothly under different climatic conditions give a wide range of possibilities for its installation on the client side.
Point-to-point mode (bridge)
Nanostation M2K. Indispensable when organizing Wi-Fi bridges. What could be easier than using two devices for connecting to the Internet of the country house in a small distance from the city? Such a mode will also be very useful for a video surveillance system when streams from multiple cameras should be transferred via a wireless network. In addition, the stability and street execution of the device will be decisive factors when building trunk wireless channels. This access point will allow making bridges at a distance of about 10 km.
Management and application
In Russia Nanostation M2K Found a wide application as a means of organizing Wi-Fi networks in rural regions, but it is great for connecting to a corporate network of any remote office, a production body, a logistics complex or a warehouse. All access point interfaces (2 RJ-45 network connector) are under the protective lid. It protects them from damage and adverse climatic conditions. Nanostation M2K - This is one of the most popular and tested solutions today.
Wireless access points can be seen in offices. Flat boxes are designed to optimally transmit a wireless network signal. Network functions - Internet connection (network gateway), protection (firewall) and local network management (assignment of IP addresses and routing) are performed by other devices.
Unlike professional environment, a router in a private home network performs all network functions, including the creation of a wireless network. This means that you have to make compromises, and the shortcomings are manifested the strongest in the network. Already only the location of the router in most cases is determined not the optimal coating, but the installation site of the power outlet. At the same time, the connected cables do not allow the device highly, which would ensure optimal conditions for the wireless network.
In addition, wireless technologies are developing faster than everyone else. Thus, in the five-year-old limit router, only the standard of the wireless network is outdated, and all other components work are still quite good. In addition, the fine tuning for most functions is available only in fairly expensive routers, which additionally inclines the scales bowl is not in favor of the new (that is, the road) model. However, the available devices operating only in the 2.4 GHz range (for example, from the provider) can be equipped with modern 5 GHz technology using the access point.
With the help of a PowerLine technology, the access point can provide a wireless network another floor or other part of the house
Access points for professional wireless networks
Access points with 802.11ac support are about 6,000 rubles, that is, no more than a good wireless repeater. Thanks to a powerful transmitter and more convenient options for location, the access point can extend the coating of the router network or completely replace it. If earlier, these special functional stations were available only for experienced users (since it is designed for use as part of a complex infrastructure), modern models additionally offer a convenient web interface for basic configuration.
A new NETGEAR WAC510 device that can be configured through a smartphone application demonstrates that access points can be very easy to use. On the following two pages, we will talk about testing this device, as well as more accessible TP-LINK EAP245 with 802.11ac support with a data transfer rate of 1300 Mbps.
The professional access point includes a mount that allows you to install it on the ceiling, wall or wardrobe Connecting and operating modes
Access points can be fundamentally connected to the router and operate in different modes, from which we allocated four main.
\u003e Replacing the router wireless network. The access point is connected to the router's network port (LAN) and to the power supply (for network equipment with POWER OVER Ethernet support, a fairly standard twisted pair). Access point forms a new wireless network. Computers and other devices that are connected to it receive IP addresses and access to the Internet from the router, that is, are on its network, as if they were connected to its Wi-Fi. In this case, you only need to perform a simple initial setting in the access point web interface. If the router and access point work in the same room, it is better to completely disable the wireless network on the first to completely interfere with the access point signal.
Netgear Wac510 Access Point provides for a router mode in which it itself assigns IP addresses \u003e Expansion of the wireless network of routers. If neither the access point nor the router is separately able to distribute the network across the apartment, it is worth trying to combine their efforts. Using a long twisted pair or PowerLine adapter, place the access point in the place where you need to optimize the wireless network coverage. In this case, in the Access Point Web Interface, you need to specify the same wireless network name (SSID) and WPA2 password, which in the settings of the router network, but at the same time different channels - the better they will be from each other, the better (for example, for stripes 2.4 GHz Channels 1 and 13).
Client devices will automatically find the strongest signal in the zone of their reach, even if you move to them on the rooms. Similar features are offered instruments that are called PowerLine Wi-Fi Extender, designed to expand the coating: they combine the PowerLine adapter and the wireless transmitter. The advantages of the "real" access point are in larger antennas and more flexible location capabilities (for example, installation on the ceiling or cabinet), which promises better signal transmission.
WDS WDS mode works as a wireless network repeater, but before you need to configure WDS in the base router \u003e Instead of repeater. If you connect the access point to the router via cable or PowerLine is not possible, you can optimize the router network using wireless network distribution technology - Wireless Distribution System (WDS). The access point is different from the usual repeater larger antennas, which means the possibility of expanding the coating zone and an increase in the data transfer rate.
\u003e Access point in router mode. NetGear Wac510 can be used as a router with which you can not only form a network, but also to manage it. However, to connect to the Internet, you need an Ethernet UPLink connection - for example, using a cable modem or LTE modem. The device is not able to independently install the DSL connection.
Access point with configuration applicationRouter, WDS Repeater or Just Access Point - Netgear Wac510 is characterized by several use options.
Rich Functionality: Netgear Wac510
This access point is easily configured from the NetGear Insight smartphones. If we take into account the relatively low cost, the device becomes attractive including for private use.
With the application for Android and iOS NetGear Insight, the initial setting of WAC510 is easy and easy In the simplest case, the process of the first launch is as follows. WAC510 is connected along a twisted pair to the existing router. The tablet or smartphone connected to the router wireless network is set to the Netgear Insight application in which the helper window is started. Next you need to open the "Access Point | | ... WiFi Discovery | Connect to WiFi ... | Discover Device, "click on the access point, select a country in which the device works (this is necessary in order to determine which access point channels can use), set the network name (SSID) and WPA2-PSK password - that's all.
Web Interface with Wide Possibilities
After the main settings, connect the client devices to the Wireless Wireline Wire510. Cable devices can be connected through its additional network port. More detailed settings are in the WAC510 web interface. To open them, find the IP address of the access point in the router web interface. First you need to change the standard ADMIN / PASSWORD login - they are in the menu "Management | Configuration | System | Advanced | User Accounts.
From additional options for WAC510, the WDS is configured as an example, which is in the Configuration section. This technology allows you to combine multiple access points in a single wireless network with centralized control - detailed instructions are in the user manual. You can configure WAC510 to use as a router through the Configuration | System | Basic »- All configurations are completely reset there, including the name of the wireless network.
For those who want in the NetGear web interface, it is possible to configure all the subtleties of the wireless network. Practical configuration testing and using the WAC510 web interface left good impressions, although to apply changes (first of all for a restart), the device sometimes required a little longer than I would like. Performance measurements using the JPERF Benchmark on the HP Pro X2 tablet on the Intel AC 8265 chip Wi-Fi first disappointed a little disappointed, especially in a 2.4 GHz band, in which old smartphones, televisions and other client devices work simply. The highest speed, and evenly in all directions, the NetGear access point reached when the client device was near and at the same level with it.
That is, the radiation of the signal is obviously optimized for uniform coating of the surrounding area than for aimed at one direction, therefore a network with multiple client devices will demonstrate good performance if these devices are successfully distributed in space. At the same time, the maximum performance NetGear significantly exceeds the possibilities of old weak routers and repeaters. Power consumption The standby mode is approximately half of the power of a full-fledged wireless router, and during data transmission it is almost not rising (from 4.3 to about 4.5 W).
NETGEAR WAC510 compared to TP-LINK EAP245The TP-LINK access point provides higher performance, while NETGEAR due to the set features represents more use options.
At high speeds: TP-LINK EAP245
In appearance, TP-LINK EAP245 resembles NetGear (and many other access points). But here, through a twisted pair, you can only install the UPLink connection with the router (WAN), and you cannot connect the client device. In addition, it is not provided to use the device as a repeater and there is no configuration application for the smartphone.
Wireless SpecialistTP-LINK EAP245 offers less opportunities than NetGear, but the wireless network of this device is more powerful, and it costs it cheaper
But TP-LINK is worth a little cheaper than Netgear, and in the 802.11ac standard reaches the data rate not 866, but 1300 Mbps. Setup is easiest to run in the web interface. The IP address can be found as in the case of NetGear, in the router web interface. When you first start, first set the username and reliable password for the web interface. The input system works ordered, responds instantly, and the device quickly applies changes.
ATTENTION: For TP-LINK EAP245, you must first additionally activate WPA encryption for both bands 2.4 and 5 GHz The real disadvantage of the security of the device is that it creates two open networks by default (in the ranges of 2.4 and 5 GHz), to protect individual measures to protect. To do this, on the Wireless tab and next "SSIDS", click the notepad icon next to the "modify". Specify the name of the wireless network (SSID), for "Security Mode", select "WPA-PSK" for "Version" - "WPA2-PSK", enter a reliable password for "Wireless Password" and confirm the changes by clicking the "OK" button at the bottom. Then, at the top of the page, switch to the network in the 5 GHz band and repeat the same.
Access Points: Assortment
Due to the great popularity of access points in the business segment, the range of these devices is very wide, especially from specialized network equipment providers, such as D-Link, Lancom or Ubiquity. Such devices cost more than 10,000 rubles and offer wide functionality not used at home. Therefore, for testing, we chose two available simple models from NetGear and TP-Link.
High speed wireless network
All other default settings EAP245 intuitively understandable. Some options can be interesting for commercial use of the device, for example, a scave page with the terms of use. Practical for home use is the Scheduler function, which includes and disables the wireless network in graphics.
EAP Controller provides centralized control of dozens of access points In terms of measurement of performance, the access point EAP245 was impressed by the results in the 802.11ac 5 GHz standard and in 802.11n 2.4 GHz. Compared to NetGear, the TP-LINK signal power is larger - the maximum speed has been achieved when the panel with the logo has been addressed to the client device. But thanks to the high speed resources in the scenario of use in which we conducted measurements, TP-Link turned out to be faster than NetGear in all directions.
In general, the EAP245 manufactured by TP-Link is a good choice for those who need a clean access point with the highest possible productivity at a low price. The purchase of NetGear Wac510 will meet itself in cases where, first of all, the device must be simple (with the application from the application) or used not only as an access point, but also as a router or WDS device. Anyway, professional devices once and forever will decide almost all the problems of the coating and transmission rate.
Photo: Manufacturers; CHIP STUDIOS / SIMON KIRSCH
Tags WLAN
